<?php
namespace Cmf\Library\Category;

use Phalcon\Mvc\User\Component;

class Category extends Component
{
    // 一维数组无限分类
    Static Public function unlimitedForLevel($cate, $html = '————', $pid = 0, $level = 0)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $v['level'] = $level + 1;
                $v['html'] = str_repeat($html, $level);
                $arr[] = $v;
                $arr = array_merge($arr, self::unlimitedForLevel($cate, $html, $v['id'], $level + 1));
            }
        }

        return $arr;
    }

    // 多维数组无限分类
    Static Public function unlimitedForLayer($cate, $name = 'child', $pid = 0)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $v[$name] = self::unlimitedForLayer($cate, $name, $v['id']);
                $arr[] = $v;
            }
        }

        return $arr;
    }

    // 传递一个子分类ID返回所有的父级分类
    Static Public function getParents($cate, $id)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['id'] == $id) {
                $arr[] = $v;
                $arr = array_merge(self::getParents($cate, $v['pid']), $arr);
            }
        }

        return $arr;
    }

    // 传递一个父级分类ID返回所有分类ID
    Static Public function getChildsId($cate, $pid)
    {
        $arr = array();
        foreach ($cate as $v) {
            if ($v['pid'] == $pid) {
                $arr[] = $v['id'];
                $arr = array_merge($arr, self::getChildsId($cate, $v['id']));
            }
        }

        return $arr;
    }

    //传递父级分类ID返回所有子级分类
    Static Public function getChilds($cate, $pid)
    {
        $arr = array();
        foreach ($cate as $v) {
            # code...
            if ($v['pid'] == $pid) {
                # code...
                $arr[] = $v;
                $arr = array_merge($arr, self::getChilds($cate, $v['id']));
            }
        }

        return $arr;
    }
}